Staybolt-chuck



G. COUSINS.

STAYBOLT CHUCK.

APPLICATION FILED DEC. 23. 1920.

Patentedl Oct. 11, 1921..

2 SHEETS-SHEET 1- I g INVENTOR 32 079@6'0l6w I Arron/VH8 G. COUSINS.

STAYBOLT CHUCK. APPLICATION FILED DEC. 23, 1920.

Patented 00m. 11,1921

2 SHEETS-SHEET 2- mwz ami l/VVENTQR GeorgeCousws,

ATTORNEYS WITNESSES ewe "YO K- j srn reonr-oiiuox.

iiseaaea Mom/it may qomrem:

Be it known that I; GnoRGE Cousins, a

citizen of the United States, an;da resident of Oswego, in the county of Oswego and j 5 State of New York, have invented' certain new and useful Improvements-in Staybolts Chucks; of which the following is a specificationp 3 My present invention relates" generally to the ,Inanipulation of stay bolts inscrewing the same in and removing the samefrom operativefposition wherever used, it being a well known that short projections are invariably left which may, by the use of'an implement proposed by my invention, be effectively 'enga'gednnd', by application of manual orgpowei' connections to the irnple ment, thel'stay bolt maybe turned inwardly or outwardlydependin'g upon the direction or applicationofthepower.

lhei objectoffmyinvention is the pro vision of an effective, strong "and durable implement in the nature of a ohuck by whith to engageand rotateja stay bolt in either directionqand with equal efficiency, and a still further objectis the prOViSiOn of an implement in the nature of a chuck in which thestay bolt engaging jaws may be readily adjusted and actually forced into operative connectionwith the projecting portion of a stay bolt. 1 v Stilffurther objects, including the pro vision of; stay bolt engaging jaws ofreadily renewable, adjustable. and interchangeable nature. insuring long, active and efficient life, will. bebetter understood from the followingdetaileddescription of the invention,

in which'referencelis. made to the (1 000111 specification, andwherein, 3

Figure l is' a rear p ov c i Fig. 2 is atop plan view thereof partly broken away and in section, Fig. 3 is a sectional rear elevation of the faceplate of the chuck of Figs. 1 and 2',

Fig". 4c is a View similar to Fig. 3 showing a slightly modified arrangement of adjust panying drawings; forming ajpart'of this.

ing slots, o r

Flg. 5 1s a front elevation of the aw forming means showing the same innormal position,

Fig. 6 is aview similar toFigQ5 showing speeiiieation of Lettensll atent, Application filed December 23, 1:120. Serial no, 432,736.,

elevation of my im-.

Fatentsd Uot.

ti, rear.

the jawfforming members adjuste'dto engage a stay bolt of small diameter, and

n Fig. 7 is adetail section taken on line 77 Referring now to these ligures I have shown my improved implement as compris' ing a preferably circularface plate 10 from the centrallrear portion of which projectsa rearwardly extending shank 11', in the pres ent instance shown as a taper shank; but which may of coursebe simply a squared extending shank, depending upon whether it is to be used with power or manually actuatedconnections. In any event this shank preferably has an enlarged annular portion ori-coll ar 12 spaced from the rear surface of the face plate 10, and around which an adjusting plate 13 is centrally mounted to rotate. This adjusting plate has diametrioall y outstanding armsll and diametrically opposed extensions 15, the latter at right angles tothegarms lland provided with lengthwise slots 16. j i Y Betweenthe adjusting plate 13 which roametri'cally' opposed slots 18 thereof are somewhat narrower than the slots 16 of the adjusting plate and the liner or 'connecting plate. terminates intermediate the end of the arms. 14 of the adjusting pl t 3 in h;

cated by thedotted lines in Fig.1. The two parts of the connecting-plateor liner'17 are connected to the adjusting plate 13 by screws and the like 19,;which serves to'hold the two parts" of the liner in proper position whereby it functions to prevent rearward movement of" the adjusting plate with respectto the face plate 10 owing to the engagement with collar 12 of the shank. r j j "the jaw formingmeansshown in Figs. 5 and 6 are disposed at the front surface of the face plate as seen in Fig. 2 and consists ofa s eris of notched straight arms 20 and 21, whose ends are apertured for-the reception of pivot pins 22 and 23, pins 22having inner heads 24' abutting-the: front surface of face plate .10 and pins' 23* having heads "-25 seated in the slots 18 of the liner or connecting plate 17 v The arms 20 and 21 of the jaw' have toothed inner and outer surfaces and 31 and these arms, provided as they are with squared. ends, are joined in endwise lapping relation'to form an adjustable rectangular jaw in which the arms 20 occur at opposite; sides and singly while the arms 21 occur at the other opposite sides in spaced parallel relation to receive between the ends thereof, the ends of the arms 20. The pivot pins 22 and 23 extend loosely through end apertures. of thearms 20 and 21 and are provided at the forward face of the jaw with washers 32 and-held inv place by cotter pins 33, upon removal of'the latter andthe washers', it becomes quite obvious the several toothed arms may be removed and replaced in interchanged relation tov bring new unused portions of'their toothed edges to the effective inner side of portion ofthe jaw.

In Figs. 1 and 3 I have shown the cam slots of the face plate 10 so arranged that the stems 26 of the pins 23 are disposed centrally between the ends ofthe slots in their innermost positions at the inner ends offthe' slots16 of the adjusting plate 13, the' jaw being in this position of the square form of Fig. 5 and in position to receive the largest diameter of stay bolt 34 which the chuck is designed to operate upon. By grasping the arn1s14 of the adjusting plate and rotating the adjusting plate in either direction, the pivot pins'23 will be shifted outwardly away from one another, causing inward movement ofithe pins 22 and thus bringing about adustmentof thej aw to engage a. stay bolt 35 of comparatively small diameter as in Fig. 6, it being obvious that by means of this adjustment the inner toothed faces of the jaw arms are actually 7 and positively pressed into engagement with the stay bolt surface. I 1

Instead of v the slots 27 shown in Figs. 1 and 3, theface plate may be provided with offset arcuate slots 36 as in Fig.4 on the face plate 10, itbeing obvious that slots of this and otherform are adapted; to act in the nature of cams in connection with the ad,- justment of the jaw: through manipulation of the adjusting plate 13 and that-still other and differently formed slots may be utilized for thispurpose. i

In order to bring the jaw back to its normal position shown in Fig.5, brackets 37 may be disposedbetween and pivotally connected to the spaced pairs of arms 21, to serve as anchors for flat springs 38, confrom the work, the springs will act to return the same to the position of Fig. 5.

It will also be noted by reference to Figs.

hand 6 that the inner toothed edges 30 of the jaws are so arranged that the jaws 20 grip the work upon rotation of the chuck in one direction while the jaws 21 grip the work upon rotation of the chuck in the opposite direction. 7

If so desired the face plate 10 may be provided with a concave recess 40 at one .point in its rear edge, to receive the inner conical end of a screw 4C1 threaded through one of the arms 14 of the adjusting plate 13 so that the jaw may be retained by this means in the normal position shown in Fig. 5, with just suflicient effectiveness to support the same while this jaw is being applied over the projectingportion of a stay bolt and before the jaw is actually adjusted into effective engagement with the stay bolt for manipulation of the adjusting plate.

By thus providing. for effective engagcment of a stay bolt and for rotation of the chuck either through power connections such as an electric drill or manually through the'use of a socket or other wrench, and more particularly by the provision of the adjustable interchangeable jaw forming arms 20 and 21 with their toothed inner and outer surfaces, I propose an implement -which will be effective and eflicient in use face of the face plate and engaging the said extended pivot pins for shifting the latter in the face plate slots. I

2. A chuck of the type described including a face plate having cam slots, jaw forming members consisting of toothed arms in endwise overlapping relation at the front surface .of the face plate, pivot pins extending through the overlapping ends of the jaws and certain of which pins are extended rearwardly through the cam slots of the face plate, and means adjacent to the rear surface of the face plate and engaging the said extended pivot pins for shifting the latter in the face plate slots, said last named means including an adjusting'plateprovided with slots receiving the extended pivot pins and slots, and a jaw at the front surface of the face plate, said jjaw including a series of arms having toothed edges and overlapping ends, and pivot pins connecting the said overlapping ends of the arms, certain of which are extended rearwardly through the face plate slots and into the slots ofthe adjusting plate as described.

LA chuck of the character described ineluding a face plate and anarticle engaging jaw on the face plate comprisng a plurality of arms having toothed edges and overlapping ends, pivot pins extending through the said overlapping ends and upon which the arms are removably supported,certain of said pins having adjustable connection with a the face plate and means for adjusting the pins onthe face plate as described.

5. A chuck including a face plate having cam slots and a-rearwardly projecting axial shank, a jaw at the front surface of the face plate includingtoothed arms having overlapping ends, pivot pins extending through said ends and detachably connecting the arms, certain of which pivot pins are extended rearwardly through the cam slots of the face plate, and anadjusting plate rotatably disposed at the rear of the face plate and having means to movably engage the said shank and the rear ends of said projecting pivot pins.

6. A chuck including a: face plate having cam slots and a rearwardly projecting axial shank, a jaw at the front surface of the face plate including toothed arms having overlapping ends, pivot pins extending through i said ends and detachably connecting the arms,.certain of which pivot pins are extended rearwardly through the cam slots of the face plate and'are provided with rear heads, an adjusting plate rotatable at the rear surface of the face plate and having slots in which the rear heads of said pivot pins are disposed, and a connecting plate disposed between the adjusting plate and the face plate, said connecting plate being secured to the adjusting plate and having means to movably engage the said extended pivot pins and the shank of the face plate for the purpose described. 7

7 A chuck of the character described including a jaw having a series of armsprovided with toothed inner and outer edges and with overlapping ends, pivot pins extending through the said overlapping ends and with respect to which the toothed arms are removably held, means for supporting and adjusting said pivot pins said arms having square ends, and prings carried by certain of the arms, having free ends engaging the square ends of the other arms to normally hold the arms in right angular relation.

chosen cousins;

Witnesses CHARLES W. DINGS, BYRON B. LOUREY. 

